化学还原新体系制备负载Ni-B非晶态催化剂及其催化加氢性能  

Preparation of Supported Ni-B Amorphous Alloy Catalyst via New Chemical Reduction System and Its Catalytic Hydrogenation Properties

作　　者：孙昱[1] 吴秋洁[1] 李斌栋[1] 吕春绪[1] 邹祺[1] 

机构地区：[1]南京理工大学化工学院,南京210094

出　　处：《应用化学》2006年第9期1047-1051,共5页Chinese Journal of Applied Chemistry

摘　　要：采用水合肼和硼氢化钾为共还原剂,适当比例的甲醇、乙醇和水的混合物为溶剂,制备得到负载催化剂P1。经过TEM、XRD、SAED表征结果表明,该催化剂是一种纳米级非晶态合金。将P1催化剂用于邻氯硝基苯加氢反应中,并与常规方法所制备的非晶态催化剂P2的加氢性能进行了比较,P1催化剂的活性和选择性略大于P2催化剂,但制备P1催化剂所用的硼氢化钾的量仅相当于制备P2催化剂的50%。讨论了水合肼、硼氢化钾、pH值和溶剂对催化剂性能的影响。The supported catalyst P1 was prepared with hydrazine hydrate and potassium borohydride as co-reducers in a mixed solvent consisting of methanol, ethanol and water in a proper proportion. The catalyst was a kind of nanosized amorphous alloy characterized by TEM, XRD and SAED. Catalyst PI was used to catalyze the hydrogenation of o-chloronitrobenzene, and compared with the amorphous catalyst P2 prepared by the common method. As it is shown in the results, the activity and selectivity of P1 are slightly higher than those of P2, and the amount of potassium borohydride consumed in the preparation of P1 was only half of that in the preparation of P2. The effects of hydrazine hydrate, potassium borohydride, pH and solvent on the properties of the catalyst were also discussed.

关 键 词：共还原剂 非晶态合金 催化加氢 

分 类 号：O643.3[理学—物理化学]